Slit coating die head

Abstract

The utility model relates to a slit coating die head which comprises a rectangular outer shell with an opening in the right end, a lower die is fixed on the lower end face of the outer shell, an upper die is arranged on the upper side of the lower die, a gasket is arranged between the upper die and the lower die, and the gasket is a U-shaped plate with an opening facing outwards. The upper die can move up and down, through holes are formed in the front end face and the rear end face of the outer shell respectively, a transverse rod capable of axially moving along the through holes is arranged in the through holes, an adjusting gasket is arranged at the end, close to the inner side of the outer shell, of the transverse rod, a sinking groove is formed in the end face of the inner side of the transverse rod, and one end of the adjusting gasket is arranged in the sinking groove. The rotating blocks are additionally arranged on the front side and the rear side of the outer shell, horizontal movement of the adjusting gaskets is controlled through thread fit, the distance between the adjusting gaskets on the front side and the rear side is changed, only one gasket and one adjusting gasket with the same thickness need to be prepared, and the mode that the extrusion width is adjusted through the rotating blocks is safer and saves labor. The application range of the gasket is greatly widened, adjusting difficulty is reduced, and gasket cost is saved.

Description

Technical Field

[0001] The utility model relates to the field of slit coating, in particular to a slit coating die head. Background Art

[0002] Existing slit coating devices need to replace different gaskets according to different coating requirements. The gasket determines both the coating thickness and the coating width. During the replacement of the gasket, the upper and lower parts of the die head need to be separated, and then reassembled after replacement. For larger-sized die heads, it is extremely laborious to replace the gasket, and assembly errors are likely to occur during the back-and-forth disassembly and assembly processes, affecting the accuracy and service life of the die head. In the prior art, there are coating devices that improve the die head. For example, the slit die head flipping device disclosed in the patent with the publication number CN203448244 U uses the flipping of the upper die and the lower die that are hinged to each other to replace the gasket to achieve different coating requirements of different models, so as to quickly replace the gasket. However, this die head assembly method has the following drawbacks: 1. Hinging and pin shaft connection are two connection methods that inherently have assembly errors, which will seriously affect the extrusion accuracy; 2. When closing the upper and lower dies, since the hinge shaft is located at the rear side, the main stress parts are the hinge shaft and the front sides of the upper and lower dies. The die head is prone to uneven stress for a long time, affecting the service life of the die head and the gasket; 3. This scheme can only change the extrusion width by replacing the gasket and cannot change the extrusion thickness. Using gaskets of different thicknesses will cause the upper and lower dies to not close properly; 4. When replacing the gasket of this device, after the upper die is turned up, the upper die still has the possibility of turning forward, posing a safety hazard. Summary of the Utility Model

[0003] In view of the above situation, to overcome the defects of the prior art, the utility model adopts a slit coating die head, which solves the problems of troublesome gasket replacement and potential safety hazards in the prior art.

[0004] The technical solution it adopts is that a slit coating die head includes a rectangular outer shell body with an opening at the right end. A lower die is fixed to the lower end face of the outer shell body. An upper die is arranged above the lower die, and a gasket is arranged between the upper die and the lower die. The gasket is a U-shaped plate with an opening facing outward; the upper die can move up and down. Through holes are respectively opened on the front and rear end faces of the outer shell body, and a cross bar that can move axially along the through holes is arranged in the through holes. One end of the cross bar close to the inner side of the outer shell body is provided with an adjusting gasket, and a sunk groove is opened on the inner end face of the cross bar. One end of the adjusting gasket is placed in the sunk groove.

[0005] A rotating block is respectively rotatably connected to the front and rear end faces of the outer shell body. A threaded hole penetrating the front and rear end faces is opened in the middle of the rotating block. The outer end of the cross bar penetrates the threaded hole and is threadedly connected to the rotating block.

[0006] The upper end of the described outer housing is fixed with an upper housing. Inside the upper housing, there is a vertical rod that can move up and down. The lower end of the vertical rod penetrates the upper end face of the outer housing and is fixedly connected to the upper mold. Above the vertical rod in the cavity of the upper housing, there is a rotating shaft placed horizontally in the front and back directions. A cam is fixed in the middle of the rotating shaft. The front end of the rotating shaft penetrates the front end face of the upper housing and is fixedly connected to a swing rod. A tension spring is arranged between the upper mold and the upper end face of the outer housing, and the tension spring always gives the upper mold an upward pulling force.

[0007] A plurality of the described vertical rods are arranged in a front-back array. A connecting block is arranged on the lower side of the cam, and the connecting block is fixedly connected to all the vertical rods.

[0008] In the middle of the upper end face of the described lower mold, a liquid supply cavity is opened on the left side of the cross bar. The lower end of the liquid supply cavity is provided with an upper liquid hole that penetrates the lower end face of the outer housing. The right end of the gasket does not extend beyond the right side of the liquid supply cavity.

[0009] The described sinking groove is a rectangular groove and its upper end penetrates the upper end face of the cross bar. A rectangular insertion rod is fixed on the left side of the outer end face of the adjusting gasket. The insertion rod can be inserted into the sinking groove, and the left and right end faces of the insertion rod are in contact with the left and right end faces of the sinking groove.

[0010] The left end faces of the described adjusting gasket and the insertion rod are flush with the right end face of the liquid supply cavity. The right end face of the adjusting gasket is flush with the right end face of the lower mold. On the upper end face of the lower mold, a stop bar is respectively arranged on the left side of each adjusting gasket. The left and right ends of the stop bar are respectively in contact with the gasket and the adjusting gasket, and the thickness of the stop bar is greater than that of the gasket and the adjusting gasket. The stop bar is made of rubber material.

[0011] The thickness of the described adjusting gasket and the insertion rod is always consistent with that of the gasket.

[0012] The present utility model has the following advantages compared with the prior art:

[0013] 1. By adding rotatable rotating blocks to the front and back sides of the outer housing and controlling the horizontal movement of the adjusting gasket through thread cooperation, the distance between the adjusting gaskets on the front and back sides is changed, thereby changing the extrusion width. Only one set of gaskets and adjusting gaskets of one thickness needs to be prepared. Moreover, the method of adjusting the extrusion width through the rotating block is safer and more labor-saving, greatly improving the applicable range of the gasket, reducing the adjustment difficulty and saving the gasket cost;

[0014] 2. By the cooperation of the swing rod and the cam rotation and the tension spring, the upper mold is controlled to move up and down, which is fast, labor-saving and safer in operation;

[0015] 3. The method of driving the upper mold to move vertically up and down through the vertical rod is more stable, and the extrusion force of multiple groups of vertical rods on the upper mold is more uniform downward, and it can adapt to gaskets of different thicknesses;

[0016] 4. Through the cooperation of the through groove with an open upper end and the insertion rod, it can be applicable to adjusting gaskets of different thicknesses, and the installation and disassembly are convenient. Description of the Drawings

[0017] Figure 1 This is the front view of the present utility model.

[0018] Figure 2 This is the front sectional view of the present utility model.

[0019] Figure 3 This is the top sectional view of the present utility model.

[0020] Figure 4 This is the front view of the rear cross bar of the present utility model. Specific embodiments

[0021] The following further elaborates in detail on the specific embodiments of the present utility model in conjunction with the attached drawings.

[0022] Consisting of Figures 1 to 4 As shown, the present utility model includes a rectangular outer shell 1 with an open right end. A lower die 2 is fixed to the lower end face of the outer shell 1. An upper die 3 is arranged above the lower die 2. A gasket 4 is arranged between the upper die 3 and the lower die 2. The gasket 4 is a U-shaped plate with an opening facing outwards. The upper die 3 can move up and down. Through holes 5 are respectively opened on the front and rear end faces of the outer shell 1. A cross bar 6 that can move along the axial direction of the through hole is arranged in the through hole 5. An adjusting gasket 7 is arranged at one end of the cross bar 6 close to the inner side of the outer shell 1. A sunk groove 8 is opened on the inner end face of the cross bar 6. One end of the adjusting gasket 7 is placed in the sunk groove 8.

[0023] A rotating block 9 is respectively rotatably connected to the front and rear end faces of the outer shell 1. A threaded hole penetrating the front and rear end faces is opened in the middle of the rotating block 9. The outer end of the cross bar 6 penetrates the threaded hole and is threadedly connected to the rotating block 9.

[0024] An upper shell 10 is fixed to the upper end of the outer shell 1. A vertical rod 11 that can move up and down is arranged in the upper shell 10. The lower end of the vertical rod 11 penetrates the upper end face of the outer shell 1 and is fixedly connected to the upper die 3. A rotating shaft 12 placed horizontally front and rear is arranged above the vertical rod 11 in the cavity of the upper shell 10. A cam 13 is fixed to the middle of the rotating shaft 12. The front end of the rotating shaft 12 penetrates the front end face of the upper shell 1 and is fixedly connected to a swing rod 14. A tension spring is arranged between the upper die 3 and the upper end face of the outer shell 1. The tension spring always gives an upward pulling force to the upper die 3.

[0025] A plurality of vertical rods 11 are arranged in an array front and rear. A connecting block is arranged below the cam 13. The connecting block is fixedly connected to all the vertical rods 11

[0026] A liquid supply cavity 15 is opened in the middle of the upper end face of the lower die 2 on the left side of the cross bar 6. An upper liquid hole 16 penetrating the lower end face of the outer shell 1 is opened at the lower end of the liquid supply cavity 15. The right end of the gasket 4 does not extend beyond the right side of the liquid supply cavity 15.

[0027] The described sinking groove 8 is a rectangular groove and its upper end penetrates through the upper end face of the cross bar 6. A rectangular inserting rod 17 is fixed to the left side of the outer end face of the adjusting gasket 7. The inserting rod 17 can be inserted into the sinking groove 8 and the left and right end faces of the inserting rod 17 are in contact with the left and right end faces of the sinking groove 8.

[0028] The left end faces of the described adjusting gasket 7 and the inserting rod 17 are flush with the right end face of the liquid supply cavity 15. The right end face of the adjusting gasket 7 is flush with the right end face of the lower die 2. On the upper end face of the lower die 2, a retaining strip 18 is respectively arranged on the left side of each adjusting gasket 7. The left and right ends of the retaining strip 18 are respectively in contact with the gasket 4 and the adjusting gasket 7 and its thickness is greater than that of the gasket 4 and the adjusting gasket 7. The retaining strip 18 is made of rubber material.

[0029] The thicknesses of the described adjusting gasket 7 and the inserting rod 17 are always consistent with that of the gasket 4.

[0030] It is worth mentioning that a pressure sensor is arranged in the liquid supply cavity of the hydraulic cylinder 10 to control the liquid supply of the hydraulic rod. After the upper die 3 presses the lower die 2 and the gasket 4 tightly, the pressure sensor controls to stop supplying liquid to the hydraulic cylinder. Subsequently, the pressure sensor can continue to detect the pressure between the upper and lower dies during the extrusion operation.

[0031] When the present utility model is in use, first, the swing rod 14 is swung to rotate the cam 13, so that the near rest end of the cam 13 contacts the upper end of the vertical rod 11. At this time, the upper die 3 is located at the uppermost end under the action of the tension spring and is arranged at an interval from the lower die 2. Then, gaskets 4 with the required coating thickness are placed above the lower die 2 at intervals. Then, the adjusting gaskets 7 with the same thickness as the gaskets 4 are inserted into the sinking grooves 8 through the inserting rods 17. Then, the positions of the cross bars 6 on the front and rear sides are adjusted by rotating the rotating block 9, and the distance between the adjusting gaskets 7 on the front and rear sides is changed, so as to change the extrusion width. Then, the swing rod 14 is swung in the reverse direction to make the far rest end of the cam 13 contact the upper end of the vertical rod 11. The upper die 3 moves downward against the tension of the tension spring to tightly squeeze the gaskets 4, the adjusting gaskets 7 and the retaining strips 18, and then the coating operation can be carried out. Since the retaining strips 18 are made of rubber material, they can block the gaps between the gaskets 4 and the adjusting gaskets 7 after being squeezed by the upper die 3, avoiding the slurry from entering the gaps under high-pressure environment.

[0032] The present utility model changes the distance between the adjusting gaskets 7 on the front and rear sides by adding rotatable rotating blocks 9 on the front and rear sides of the outer shell 1 and controlling the horizontal movement of the adjusting gaskets 7 through thread fit, so as to change the extrusion width. Only by swinging the swing rod 14 to make the upper die 3 move upward to make way under the action of the tension spring, the extrusion width can be freely adjusted. The operation is fast, labor-saving and safer. Only one set of gaskets 4 and adjusting gaskets 7 with one thickness needs to be prepared. Moreover, the method of adjusting the extrusion width through the rotating block 9 is safer and more labor-saving, greatly improving the applicable range of the gaskets, reducing the adjustment difficulty and saving the gasket cost.

Claims

1. A slot coating die head, comprising a rectangular outer shell (1) with an opening at the right end, a lower die (2) being fixed to the lower end surface of the outer shell (1), an upper die (3) being arranged on the upper side of the lower die (2), a gasket (4) being arranged between the upper die (3) and the lower die (2), the gasket (4) being a U-shaped plate with an opening facing left; characterized in that: The upper mold (3) is capable of moving up and down. The front and rear end surfaces of the outer shell (1) are respectively provided with through holes (5). A cross bar (6) capable of moving axially along the through hole is arranged in the through hole (5). An adjustment gasket (7) is arranged at one end of the cross bar (6) close to the inner side of the outer shell (1). A sink groove (8) is arranged on the inner end surface of the cross bar (6), and one end of the adjustment gasket (7) is placed in the sink groove (8).

2. A slot coating die according to claim 1, characterized in that: The front and rear end surfaces of the outer shell (1) are rotatably connected to a rotating block (9) respectively. A threaded hole penetrating the front and rear end surfaces is provided in the middle of the rotating block (9). The outer end of the cross bar (6) penetrates the threaded hole and is connected to the rotating block (9) by means of threads.

3. A slot coating die according to claim 1, characterized in that: An upper shell (10) is fixed at the upper end of the outer shell (1), a vertical rod (11) capable of moving up and down is arranged inside the upper shell (10), the lower end of the vertical rod (11) passes through the upper end surface of the outer shell (1) and is fixedly connected to the upper mold (3), a rotating shaft (12) placed horizontally in front and back is arranged above the vertical rod (11) in the cavity of the upper shell (10), a cam (13) is fixed in the middle of the rotating shaft (12), the front end of the rotating shaft (12) passes through the front end surface of the upper shell (10) and is fixedly connected to a swing rod (14), and a tension spring is arranged between the upper mold (3) and the upper end surface of the outer shell (1), and the tension spring always applies an upward pulling force to the upper mold (3).

4. A slot coating die according to claim 3, characterized in that: There are a plurality of vertical rods (11) arranged in a front and rear array, and a connecting block is provided on the lower side of the cam (13), and the connecting block is fixedly connected to all the vertical rods (11).

5. A slot coating die according to claim 1, characterized in that: A liquid supply cavity (15) is provided in the middle of the upper end surface of the lower mold (2) and located on the left side of the cross bar (6). An upper liquid hole (16) penetrating the lower end surface of the outer shell (1) is provided at the lower end of the liquid supply cavity (15). The right end of the gasket (4) does not extend beyond the right side of the liquid supply cavity (15).

6. A slot coating die according to claim 5, characterized in that: The left end faces of the adjusting gasket (7) and the insert rod (17) are flush with the right end face of the liquid supply chamber (15), and the right end face of the adjusting gasket (7) is flush with the right end face of the lower mold (2). The upper end face of the lower mold (2) is located on the left side of each adjusting gasket (7) and is provided with a stop bar (18). The left and right ends of the stop bar (18) are respectively in contact with the gasket (4) and the adjusting gasket (7) and the thickness is greater than that of the gasket (4) and the adjusting gasket (7). The stop bar (18) is made of rubber.

7. A slot coating die according to claim 1, characterized in that: The sink groove (8) is a rectangular groove and its upper end passes through the upper end surface of the cross bar (6). A rectangular insertion rod (17) is fixed to the left side of the outer end surface of the adjustment gasket (7). The insertion rod (17) can be inserted into the sink groove (8) and the left and right end surfaces of the insertion rod (17) are in contact with the left and right end surfaces of the sink groove (8).

8. A slot coating die according to claim 7, characterized in that: The thickness of the adjusting gasket (7) and the insert rod (17) is always consistent with that of the gasket (4).

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